Simplest 7 Digit Display Project || 7 Digit Display Project With Arduino For Beginners
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| circuit diagram |
#define A 8
#define B 7
#define C 6
#define D 5
#define E 4
#define F 3
#define G 2
#define DP 9 // decimal
#define common_cathode 0
#define common_anode 1
bool segMode = common_cathode; // set this to your segment type, my segment is common_cathode
int seg[] {A,B,C,D,E,F,G,DP}; // segment pins
byte chars = 35; // max value in the array "Chars"
byte Chars[35][9] {
{'0',1,1,1,1,1,1,0,0},//0
{'1',0,1,1,0,0,0,0,0},//1
{'2',1,1,0,1,1,0,1,0},//2
{'3',1,1,1,1,0,0,1,0},//3
{'4',0,1,1,0,0,1,1,0},//4
{'5',1,0,1,1,0,1,1,0},//5
{'6',1,0,1,1,1,1,1,0},//6
{'7',1,1,1,0,0,0,0,0},//7
{'8',1,1,1,1,1,1,1,0},//8
{'9',1,1,1,1,0,1,1,0},//9
{'0',1,1,1,1,1,1,0,0},//0
{'1',0,1,1,0,0,0,0,0},//1
{'2',1,1,0,1,1,0,1,0},//2
{'3',1,1,1,1,0,0,1,0},//3
{'4',0,1,1,0,0,1,1,0},//4
{'5',1,0,1,1,0,1,1,0},//5
{'6',1,0,1,1,1,1,1,0},//6
{'7',1,1,1,0,0,0,0,0},//7
{'8',1,1,1,1,1,1,1,0},//8
{'9',1,1,1,1,0,1,1,0},//9
{'0',1,1,1,1,1,1,0,0},//0
{'1',0,1,1,0,0,0,0,0},//1
{'2',1,1,0,1,1,0,1,0},//2
{'3',1,1,1,1,0,0,1,0},//3
{'4',0,1,1,0,0,1,1,0},//4
{'5',1,0,1,1,0,1,1,0},//5
{'6',1,0,1,1,1,1,1,0},//6
{'7',1,1,1,0,0,0,0,0},//7
{'8',1,1,1,1,1,1,1,0},//8
{'9',1,1,1,1,0,1,1,0},//9
};
void setup() {
// set segment pins as OUTPUT
pinMode(seg[0],OUTPUT);
pinMode(seg[1],OUTPUT);
pinMode(seg[2],OUTPUT);
pinMode(seg[3],OUTPUT);
pinMode(seg[4],OUTPUT);
pinMode(seg[5],OUTPUT);
pinMode(seg[6],OUTPUT);
pinMode(seg[7],OUTPUT);
}
void setState(bool mode) //sets the hole segment state to "mode"
{ for(int i = 0;i<=6;i++)
{
digitalWrite(seg[i],mode);
}
}
void Print(char Char) // print any character on the segment ( Note : you can't use capital characters )
{
int charNum = -1;// set search resault to -1
setState(segMode);//turn off the segment
for(int i = 0; i < chars ;i++){//search for the enterd character
if(Char == Chars[i][0]){//if the character found
charNum = i;//set the resault number into charNum ( because this function prints the character using it's number in the array )
}
}
if(charNum == -1 )// if the character not found
{
for(int i = 0;i <= 6;i++)
{
digitalWrite(seg[i],HIGH);
delay(100);
digitalWrite(seg[i],LOW);
}
for(int i = 0;i <= 2;i++)
{
delay(100);
setState(HIGH);
delay(100);
setState(LOW);
}
}else // else if the character found print it
{
for(int i = 0;i<8;i++)
{digitalWrite(seg[i],Chars[charNum][i+1]);
}
}
}
void Print(int num) // print any number on the segment
{
setState(segMode);//turn off the segment
if(num > chars || num < 0 )// if the number is not declared
{
for(int i = 0;i <= 6;i++)
{
digitalWrite(seg[i],HIGH);
delay(100);
digitalWrite(seg[i],LOW);
}
for(int i = 0;i <= 2;i++)
{
delay(100);
setState(HIGH);
delay(100);
setState(LOW);
}
}else // else if the number declared, print it
{
if(segMode == 0){ //for segment mode
for(int i = 0;i<8;i++)
{digitalWrite(seg[i],Chars[num][i+1]);
}
}
else{
for(int i = 0;i<8;i++)
{digitalWrite(seg[i],!Chars[num][i+1]);
}
}
}
}
void loop() {
for(int i = 0;i < chars;i++) //print
{
Print(i);
delay(1000);
}
}
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